JPH09502791A - Ventilation equipment including acoustic attenuators, filters for filtering purposes configured as flow attenuators - Google Patents

Abstract

PCT No. PCT/SE94/00833 Sec. 371 Date Mar. 11, 1996 Sec. 102(e) Date Mar. 11, 1996 PCT Filed Sep. 8, 1994 PCT Pub. No. WO95/08084 PCT Pub. Date Mar. 23, 1995A ventilation plant comprising fans for distribution of intake air and exhaust air in branch ducts having openings for the intake air and exhaust air. Tubular filters are sealingly attached to the openings and create a pressure drop of about 200 Pascal, which filters at flow velocities adjusted to about 2-5 m/s are acting also as throttling and sound damping devices of the plant.

Description

Detailed Description of the Invention Ventilation equipment including acoustic attenuators, filters for filtering purposes configured as flow attenuators   The invention comprises a fan for distributing intake air and exhaust air in a branch conduit, A device for balancing the air flow through the branch conduit with a throttling device located in the conduit; , Ventilation equipment comprising a device for filtering air and a sound damping device.   This type of equipment (plant) is usually located in a conduit and is laterally replaceable A filter box is provided to house the vessel unit. Here the filter is a fan Minimize pressure drop as much as possible to avoid unnecessary load Action is taken. Therefore, the filter unit is large despite the limited space. Since it has a complicated structure with a large area, it is difficult to connect it to the sealing member and I will bypass the fresh air. The filter box also requires a lot of space. Further In addition, a throttling device in the form of a regulating valve in the conduit is required. Install and adjust these devices Properly balancing and properly balancing the air flow in the conduit is a very complex and time-consuming task. Work.   The object of the present invention is to overcome the above-mentioned drawbacks and to make very demanding requirements for cleaning and operation. It is particularly suitable for devices with Therefore, simple and sufficient inspection can be realized in the occupied space. Is to provide ventilation equipment.   According to the present invention, the above object is to inhale air and exhaust air to different spaces. A tubular thick-walled filter is provided at the conduit opening for Properly regulated flow rate in the mouth, preferably The pressure is preferably about 200 Pascals at a flow velocity of about 2-5 m / sec. It also provides a force drop and the filter acts as a plant throttling and acoustic damping device. Achieved by the fact that it is used.   Air flow equilibrium and air flow through throttling devices in known plants The solution to the problems with occasional, usually loud, noise attenuation is simple according to the invention. Achieved by simple means, but this simple means is completely acceptable or standard. Conventional, i.e., conventional squeezing device and conventional sound damping device Filtration with internal or intrinsic pressure drop sized such that installation of the Is to provide a vessel. It turns out that the air flows through the filter without noise . These filters are spaced at openings for intake and exhaust of air. Since the special throttling device and the sound damping device are omitted, Are not contaminated and the devices do not disturb the air flow. Moreover, different The empty spaces become separated from each other by a filter, which allows, for example, harmful substances The particles that carry are prevented from diffusing between the different spaces, because Is the filter usually not capable of passing harmful-bearing particles through it? It is. These filters also act as acoustic damping means between different spaces You. Filter space is associated with release of sprinkler device at least in case of fire Capable of withstanding high temperatures without being destroyed under existing temperature conditions. Simplifies the critical replacement of filter media that can be made of refractory materials.   The present invention refers to the accompanying drawings which show a simplified schematic view of ventilation equipment inside a building It will be readily apparent from the description below.   The drawing discloses a building 1 having a large number of room spaces 2. air A straight conduit 4 for inhaling air is suspended from the ceiling of the corridor 3 and is also known in the art. It is connected to a fan 5 provided with a transformer 6. Air is discharged in parallel with the conduit 4. A conduit 7 for connecting is connected to a fan 8.   Branch pipes 9 from a pipe 4 for sucking air communicate with the space of the room, respectively. Each of these branch conduits is hermetically fitted with a tubular filter 11 with a closed end 12. Ends in the opened opening 10. The branch conduits 19 from the air exhaust conduit 7 are each Connecting to the room space, these branch conduits have a slightly larger area than branch conduit 19. A tubular filter 21, which is slightly clamped towards the closed end 22, is mounted sealingly. It ends in a portion 19 'having an opening 20 which is open. Filter 21 is in part 19 ' Extends over almost its entire length and is protected by a portion 19 '. Filter 11 is one Placed in the open air on the one hand, this means that these filters are sufficiently rigid. This is possible and contamination of the inside of these filters occurs. But if necessary For example, the casing may be attached to the outside of the filter as an extension of the branch conduit 9 The area may be slightly larger than 9.   Filtration devices 11 and 21 have an internal or intrinsic pressure drop of about 200 Pascals and a minimum Is in the form of a tubular filter bag adapted to block the passage of particles. Slightly large Filters with threshold or low pressure drop should be used to achieve proper equilibrium be able to. These filtration devices are easy to install. Branch pipe 9 with open end Or attached to the end of part 19 ', in the latter case a filter 21 inside part 19' Is pushed into.     The invention is, of course, not limited to the embodiments shown above, but according to the claims. Changes can be made in various ways within the scope of the invention as defined.

[Procedure of Amendment] Article 184-7, Paragraph 1 of the Patent Act [Submission date] February 20, 1995 [Correction contents]   A fan (5) for distributing the intake air and the exhaust air in the branch conduits (9, 19) , 6) and the flow of air through the branch conduit by means of a throttling device arranged in the conduit. Ventilation equipment including a balancing device, a device for filtering air, and a sound damping device At, the outlet opening (10) for sucking air and the inlet opening (20) for discharging air are A tubular thick-walled filter (11, 21) is provided, and the filter is attached to the opening (10, 20). The filter (11, 21) is installed at the appropriately adjusted flow rate in The pressure drop is large enough to act as a damping device. Ventilation equipment to collect. [Procedure of Amendment] Article 184-8 of the Patent Act [Submission date] November 7, 1995 [Correction contents]                                The scope of the claims   The intake air to the room space (2) and the exhaust air from the room space (2) are branched and guided. Equipped with fans (5, 8) for distribution in tubes (9, 19) and through branch conduits Means are provided for balancing the air flow by throttling means disposed in the conduit. In a ventilated installation, an outlet opening (10) for intake air and an inlet for exhaust air All of the pressure required to act as a throttling means for the installation, in all of the openings (20). Easily replaceable tubular filter bag (with inherent pressure drop to create force drop) Ventilation equipment characterized by being provided with (11, 21).

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Claims (1)

[Claims]   1. Fan for distributing intake air and exhaust air in the branch conduits (9, 19) (5, 6) and a restrictor installed in the conduit for air flow through the branch conduit. A device for equilibrating the device, a device for filtering air, and a sound damping device. In ventilation equipment, an outlet opening (10) for sucking in air and an inlet opening (for discharging air) ( 20) is provided with a tubular thick-walled filter (11, 21), said filter having the opening ( The filter (11, 21) also has a suitable flow rate at To create a pressure drop large enough to act as a throttling device and acoustic damping device. Ventilation equipment characterized by having.   2. The pressure drop of the filter (11, 21) is about 2-5m / sec at the opening (10, 20). The replacement of claim 1, wherein the flow rate is adjusted to about 200 Pascal. Ki equipment.